CodeCaste Mean Stack Developer Interview Questions and Answers

Reasoning , maths , coding, english

Java python css c programming sql, html.

Q1. What is oops concept with real life example
Ans. 
OOPs concept is a programming paradigm based on the concept of objects, which can contain data in the form of fields and code in the form of procedures.
• Encapsulation: bundling data and methods that operate on the data into a single unit. Example: a car object with properties like color and methods like start() and stop().

• Inheritance: allows a class to inherit properties and behavior from another class. Example: a class...read more
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Q2. Real life scenario example of oops
Ans. 
A real life scenario example of OOPs is modeling a car as an object with properties and methods.
• Create a Car class with attributes like make, model, year, color

• Define methods like start(), accelerate(), brake()

• Instantiate multiple car objects and perform actions on them
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Q3. What is collections
Ans. 
Collections in Java are classes and interfaces that provide a way to store and manipulate groups of objects.
• Collections provide a way to work with groups of objects in Java

• They include classes like ArrayList, LinkedList, HashMap, etc.

• Collections framework provides interfaces like List, Set, Map, etc.

• Collections offer methods for adding, removing, and accessing elements in a group
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Q1. Tell me about yoursef
Ans. 
I am a passionate Java developer with 5 years of experience in developing web applications and implementing software solutions.
• 5 years of experience in Java development

• Strong knowledge of web application development

• Experience in implementing software solutions

• Passionate about coding and problem-solving
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Q2. Tell me about ur project
Ans. 
Developed a web application for online shopping with user authentication and payment gateway integration.
• Used Java Spring framework for backend development

• Implemented RESTful APIs for communication between frontend and backend

• Integrated Stripe API for secure payment processing
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MCQ - 20 (aptitude), 20(c+ and sql)

Pattern, array and sql questions

Q1. Intro about Experience
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Q2. Knowledge on tools
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Q1. Sdfsfd kjdk dvfikjsf vsjv
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Q2. Sdjvks sdkvjsk skdcj
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Giva a Full stack project. based on MERN AND MEAN stack

Q1. Dsa , were easy to medium
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Q2. Some backend and azure related questions
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Q1. Strecture of sql statement
Ans. 
SQL statements are used to interact with databases by performing operations like querying, updating, and deleting data.
• SQL statements are made up of keywords like SELECT, INSERT, UPDATE, DELETE, etc.

• They are structured in a specific order, with clauses like WHERE, ORDER BY, GROUP BY, etc.

• Tables are referenced using their names, and conditions are specified to filter data.

• Joins can be used to combine data from multiple
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Basic questions like reverse a number, print Fibonacci series, character replacement

Q1. Basic questions on .net framework, c# coding language
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Q2. Advanced level questions on MySql and Linq.
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Q3. What is the best approach to find the missing number from set of consecutive n numbers
Ans. 
One approach is to calculate the sum of all numbers in the set and then subtract the sum of the given numbers to find the missing number.
• Calculate the sum of all numbers in the set using the formula n*(n+1)/2, where n is the total number of elements in the set.

• Calculate the sum of the given numbers in the set.

• Subtract the sum of the given numbers from the sum of all numbers to find the missing number.
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Q1. Salary negotiation and document process. No questions.
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JavaScript, React Js

Q1. How many years of relevant experience
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Q2. What is your current CTC
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Q3. What is your Expectation
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Q1. What is your Strength
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Q2. What is weakness
Ans. 
One weakness I have is that I can be overly critical of my own work, which can sometimes lead to self-doubt.
• I tend to overthink things and can be indecisive at times

• I have a tendency to take on too many tasks at once, leading to feeling overwhelmed

• I struggle with public speaking and often get nervous in front of large groups
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Q3. What is your Goal
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